Apple studio display 17 lcd User Manual

							 
© 2003 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service Source
Apple Studio Display 17 LCD
(ADC)
 
Updated 6 Decenber 2004 
						

							
 

© 2003 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service SourceTake Apart
 
Apple Studio Display 17 LCD (ADC) 
						

							
 

Apple Studio Display 17 LCD Take Apart - 
 
1
 
 General Information
 
General Information 
 
Overview
Identifying Versions of the Display
 
There are two versions of the display and although there are no specification differences, 
in some cases the service part will be different.
The versions can be identi fied as follows:
• Version A has a blue-gray logo (front and back).
• Version B has a silver logo (front and back) and a hinge that allows t\
he foot to collapse  to flat.
 
Note:
 
 Both version A and B have  flexible hinges, the difference is that the version B hinge 
will collapse  flat, parallel to the screen, to facilitate packing.
The Launch Button brings up the Apple Display preferences window. Note:
The Power Button turns the display on and off. Front View Rear View
Launch Button
Power On/Off Button
USB Ports
ADC Connector 
						

							
 

Apple Studio Display 17 LCD Take Apart - 
 
2
 
 General Information
 
Tools
 
The following tools are recommended for the take apart procedures.
• Cotton gloves (922-1592)
• Hex key set, metric
• Phillips #1 screwdriver
• Volt meter (for troubleshooting)
• Black stick (nylon probe tool 922-5065) or other ESD-safe, non-marring\
 tool
• ESD wriststrap and mat
 
Before Working on the Display
 
Warning: There is a risk of electric shock, fire or other hazard, if the Inverter Board, 
ADC Cable, MLB to USB Socket Cable, and the LCD Display Module are not 
replaced with the correct Apple service part.
Warning: Unless otherwise instructed in the service procedures, to avoid the risk of 
electric shock,  fire or other hazard, disconnect the ADC connector from the 
computer to ensure that the display is not receiving power during service.
Important:
 
 
• The display LCD and the inside and outside of the case can scratch and r\
etain  fingerprints easily.
• Use clean soft cotton gloves when working on the display.
• Only rest the LCD screen and case parts on a soft clean surface.
• If available, place a protective film over the display to protect it fro\
m scratches or nicks. 
• Remove all jewelry that could scratch or damage the display or plastic h\
ousing.
• Do not press on the LCD display panel or its edges as damage can result.\
 
• Do not expose the display to high temperature or humidity.
• Do not expose the display to direct sunlight.
• Follow ESD safe procedures to avoid circuit damage. Use a grounded wrist\
 strap. 
						

							
 

Apple Studio Display 17 LCD Take Apart - 
 
3
 
 General Information
 
Procedure
  
 
 
 
 
   
  
 
 
 
 
 
 
 
    FOOT REMOVAL
  1. Remove three hex key screws (a).
  2. Remove Foot and Hinge Cap.
Screw part number:
(a) 922-5551
REAR COVER, EMI SHIELD, BEZEL,  
AND USB COVER REMOVAL
  1. Remove four hex key screws (Rear Cover) (a).
  2. Remove Rear Cover and Rear Shield.
  3. Remove screw (b).
  4. Separate the USB Cover.
  5. Peel back Vent Labels if needed  
    to release EMI Shield.
  6. Slide the EMI Shield to disengage it 
    from the Chassis, then remove.
  7. Remove the Vertical and Horizontal  
    Clips from the Cradle assembly.
  Note:  The Clips can crack or break.  
    Use care when removing.  
    A black stick or flat-blade  
    screwdriver may be helpful.
  8. Separate the Bezel assembly from the 
    LCD panel assembly.
Screw part numbers:
(a) 922-5965
(b) 922-5560
(a)
(a) EMI  
Shield
Bezel
(a)
(a)
USB  
Cover
Vent
Labels
Cradle (a)
(b)
Clips Clips 
						

							
 

Apple Studio Display 17 LCD Take Apart - 
 
4
 
 General Information
CHASSIS AND LCD PANEL REMOVAL
  1. Remove eight screws (a).
  2. Peel back Vent Label and Shielding Tape, 
      as needed, to release the Backlight Bulb 
      wires.
  3. Separate the Chassis and  
      LCD panel.
Screw part number:
(a) 922-5555
(a)
(a)
(a)(a)
(a)
(a)
(a)
(a)
CRADLE, CHASSIS, LCD DISPLAY, 
MAIN BOARD & INVERTER BOARD REMOVAL
  1.  Remove seven screws (a).
  2.  Disconnect J7, J2, J1, J6, J4, J5, J3,  
    CN1, CN2, CN3 from the Main Board.
  3.  Remove seven screws (f).
  4.  Remove the Main Board and  
  Inverter Board.
  5.  Remove four screws (b) & two screws (h).
  6.  Remove the USB Connector.
  7.  Remove four screws (d).
  8.  Remove the Hinge.
  9.  Remove two screws (c).
 10.  Remove the Main ADC Cable.
 11.  Disconnect the cables from the  
  Touch Switches.
 12.  Remove two screws (e).
 13.  Remove the Touch Switches.
Screw part numbers:
(a) 922-5560
(b) 922-5560
(c) 922-5560
(d) 922-5620
(e) 922-5553
(f)  922-5554
(h) 922-5560
Touch Switch
Touch Switch 
						

							 
© 2003 Apple Computer, Inc. All rights reserved.
 

 
 
 
Service Source
Troubleshooting
 
Apple Studio Display 17 LCD (ADC) 
						

							 
Apple Studio Display 17 - 
 
1
 
 Symptom Charts
 
Symptom Charts
 
How to Use the Symptom Charts
 
The Symptom Charts included in this chapter will help you diagnose specific symptoms 
related to the product. Because cures are listed on the charts in the order of most likely 
solution, try the cures in the order presented. Verify whether or not the product continues 
to exhibit the symptom. If the symptom persists, try the next cure. 
 
Note:
 
  If you have replaced a module, reinstall the original module before you proceed to 
the next cure.
 
Note:
 
  Referring to the Block Diagram in this manual may be helpful.
 
Blank screen
 
1. Check ADC cable. Replace cable if damaged.
2. Check for bent pins in the ADC connector (note, it is normal for two of the pins to be 
slightly longer than the others). If pins are slightly bent, carefully straighten. If pins are 
severely bent, replace cable. Also, inspect or have the customer inspect the display 
port on the computer for broken pin dividers. If the display port is damaged it must be 
repaired before inserting the ADC connector.
3. Plug the display into a known-good computer with a known-good video card and ADC 
display port. Boot the computer and allow enough time to finish booting.
4. If the power button on the display is flashing, two short flashes then a long flash, in a 
delayed repeating pattern, this indicates trouble with either the inverter, backlight 
bulbs or related cables or connectors. With this in mind, continue with the 
troubleshooting steps to determine the problem. 
						

							 
Apple Studio Display 17 - 
 
2
 
 Symptom Charts5. To check whether the LCD is working, press the launch button on the display which 
will bring up the Display Preferences window (if the screen is blank you will not see the 
window). Shine a bright light such as sunlight or a high intensity lamp (see Important 
note, below) into the screen and at the same time notice whether you can see a faint 
image of the Display Preferences window or other desktop items on the screen. 
• If desktop items can be seen, the LCD panel is working. The problem may be with 
the inverter or backlight bulbs or related cables or connectors. Continue with the 
troubleshooting steps.
• If no desktop items can be seen, the problem may be with the LCD panel or the 
main board or related cables or connectors.
 
Important: 
 
Lights get very hot and can quickly damage the display; be extremely 
careful not to allow too much heat next to the screen or other parts of the display and 
do not allow the light fixture to touch the screen, or damage can result.
 
6. Warning: The inverter board generates high voltage when the display is plugged 
in. Do not touch the inverter board components, pins or connectors, when the 
display is connected to the computer.
 
7. Disconnect the display from the computer, then open the display and check for secure 
connections at TMDS, Panel Power, J7, J2, J1, J3, CN1, CN2, CN3, CN4 and CN5.
 
Note:
 
 Refer to the Block Diagram in this manual for connector locations.
8. Plug the display into a known-good computer, then boot the computer.
9. Verify +24-28V at input of J7. If not, replace ADC cable.
10. Verify +24-28V at pin 1 of J2. If not, replace the main board.
11. Verify +5V at pin 5 of J3. If not, replace the main board.
 
Partially dim screen
 
This symptom indicates a problem with the inverter or backlight bulbs (on the side of the 
display that is dim), or related cables or connectors. This may be caused by the backlight 
bulbs or the inverter not working properly.
1. Plug the display into a known-good computer with a known-good video card and ADC 
display port. Boot the computer.
2. Notice whether the power button on the display is flashing, two short flashes then a 
long flash, in a delayed repeating pattern. This indicates trouble with either the 
inverter, backlight bulbs or related cables or connectors (this indicator may not always 
be exhibited). With this in mind, continue with the troubleshooting steps to determine 
the problem. 
						

							 
Apple Studio Display 17 - 
 
3
 
 Symptom Charts
 
3. Warning: The inverter board generates high voltage when the display is plugged 
in. Do not touch the inverter board components, pins or connectors, when the 
display is connected to the computer.
 
Disconnect the display from the computer, then open the display and check for 
secure connections at CN1, CN2, CN3, CN4 and CN5.
 
Note:
 
 Refer to the Block Diagram in this manual for connector locations.
• If the inverter cable (connected to CN1) is damaged, replace the inverter cable.
• If any connectors on the inverter board are damaged, replace the inverter board.
• If any of the backlight cables (CN2, CN3, CN4, or CN5) are damaged, replace the 
LCD display.
 
USB device not working
 
1. Check for bent pins in the ADC connector (note, it is normal for two of the pins to be 
slightly longer than the others). If pins are slightly bent, carefully straighten. If pins are 
severely bent, replace cable. Also, inspect or have the customer inspect the display 
port on the computer for broken pin dividers. If the display port is damaged it must be 
repaired before inserting the ADC connector.
2. Plug the display into a computer with a known-good ADC display port, then boot the 
computer. Connect a known-good USB device into one of the USB ports on the back 
of the display, then check Apple System Profiler to see if it is recognized. Check both 
USB ports.
 
Note:
 
 
 
x 
+R, refreshes the Apple System Profiler list when USB devices are changed.
• If the device is recognized, the customer’s USB device may be the issue.
• If not, check the J6 and USB connections and cables. If not that, replace the main 
board.